Veterinary Practice in Boise That Will Accept Payment Later

I have a female Dachshund that has been sick for 2 days and I receive SSI and don't get it until the first of the month. If I don't get her to the vet she will die. I have money set a side for my pets, but I already used it on her baby who got sick, now she as had her shots. Does anyone know a vet service that will wait for my payment until the first. Thank you.